ASUS Motherboards Shutting off after 2 seconds

Hi,

I am building 2 PC's with ASUS motherboards and I am facing the same problems on both. The green light comes on on the motherboard and the CPU fan and PSU fan both spin for a second or 2, the power led also comes on and then everything stops, no fans, no power led only the on-board green light stays on. Then after I remove the power cable and reconnect after a couple of minutes same thing happens.

No hard-drive spins, no CD activity..

System 1:

ASUS A7V8X-MX SE Motherboard
Rainbow Star Case and ATX PSU - 350W output
AMD 2500+
Western Digital 80Gb H/D

System 2:

ASUS A7V266-MX Motherboard
Rainbow Star Case and ATX PSU - 350W output
AMD 2500+
Western Digital 80Gb H/D

Any help would be apperciated.

Sand..

 

From your description, one can't tell at what point you're at. The first test of a new computer being built should be when the mobo is installed, with the CPU and one memory stick, and the the front panel switches are hooked up and keyboard and monitor are attached. Only then should you connect the power, turn on the computer, and access the BIOS.

Disconnect everything to that point and try as above. If that's where you're at, you would seem to have a short somewhere. Uninstall everything and start over. Be sure you have the case and yourself grounded while you work.

 

Hi S,

Asus mobos are pretty notoriuos for being fussy about RAM. It may be the reason, especially if you are trying to use a generic brand. The Asus website has a listing of compatable brands. Post back if you cannot find it.

How did you install the CPU/heatsink? Temperature problems can cause shutdown. Check the tutorial at www.arcticsilver.com. (some people that have installed heatsinks with thermal pads have not noticed to remove the tape from the adhesive of the pad).

Get the motherboard manual for them. Strip them back to the point where it tells you to do the initial startup. If they won't start then you would need to try starting them with the motherboard on a sheet of cardboard outside the case. Considering that both cases are the same make/model, they may well be shorting to earth somewhere (check for extra standoff pins under the boards).

Matt

 

Found the Problem.....

The heat-sink was placed the wrong way. Theres no indication which way the heat-sink should fit on top of the CPU as there are 2 possible ways, the easier way has the last spring connector on the outside away from the PSU. It seems that the more difficult way of connecting the heat-sink is the correct way.

Anyway after I reseated the CPU and turned the heat-sink the other way it booted up no problems.

Thanks for the advice on the CPU-heatsink.

Sand.

 

Glad to hear you got it!
A lot of people put them on the wrong way.......IT'S EASIER!!!!!!!!!!!! But NOT correct

The tab that you use the screwdriver on is at the top!! Nearest the power supply.

Forgot to mention.....

The reason it shut off was because it was seriously overheating.

Dale